Security Bulletin: Vulnerability in SSLv3 affects Host On-Demand (CVE-2014-3566)

Summary

SSLv3 contains a vulnerability that has been referred to as the Padding Oracle On Downgraded Legacy Encryption (POODLE) attack. SSLv3 is enabled in IBM Rational Host On-Demand.

Vulnerability Details

CVE-ID: CVE-2014-3566

Description: Product could allow a remote attacker to obtain sensitive information, caused by a design error when using the SSLv3 protocol. A remote user with the ability to conduct a man-in-the-middle attack could exploit this vulnerability via a POODLE (Padding Oracle On Downgraded Legacy Encryption) attack to decrypt SSL sessions and access the plaintext of encrypted connections.

CVSS Base Score: 4.3 **CVSS Temporal Score:**See <https://exchange.xforce.ibmcloud.com/vulnerabilities/97013&gt; for the current score *CVSS Environmental Score:**Undefined CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:N/A:N)

Affected Products and Versions

IBM Rational Host On-Demand 11.0.10 and earlier.

Remediation/Fixes

Fix is available starting in version Rational Host On-Demand 11.0.11

Clients who are on older unsupported versions of IBM Rational Host On-Demand are also advised to upgrade to IBM Rational Host On-Demand 11.0.11 or above.

Workarounds and Mitigations

IBM recommends that you review your entire environment to identify areas that enable the SSLv3 protocol and take appropriate mitigation and remediation actions. The most immediate mitigation action that can be taken is disabling SSLv3.

If you have selected **_Telnet – SSL only _**protocol in HOD for secure connection to Host, please follow the below instructions to disable it.

1. Open html file with deployment wizard on HOD sever

2. Navigate to session properties

3. Under connection, select Telnet – TLS protocol for secure connection

4. Save the file by clicking Next > Next and access the file from client machine.

At the same time, ensure that the host (IBM System z, IBM System i, or any other VT hosts) have SSLv3 disabled at the Telnet server.